Characterisation of the oxide layer on carbon steel during hot conditioning of primary heat transport systems in heavy-water reactors

M. Bojinov (Corresponding Author), K. Gaonkar, S. Ghosh, V. Kain, K. Kumar, Timo Saario

    Research output: Contribution to journalArticleScientificpeer-review

    25 Citations (Scopus)

    Abstract

    The corrosion layer formation on carbon steel during hot conditioning of primary heat transport systems of pressurised heavy-water reactors has been characterised using ex-situ methods (gravimetry, electron microscopy, X-ray diffractometry). In addition, the electric and electrochemical properties of the corrosion layers have been followed in-situ by voltammetry and electrochemical impedance spectroscopy during exposure to simulated hot conditioning water chemistry. The corrosion layer formed has been found to be a bilayer oxide of the inverse spinel type. The impedance data have been quantitatively interpreted using the Mixed-Conduction Model for oxide films allowing for the estimation of certain kinetic parameters at the compact layer/electrolyte interface. The obtained results point out to the fact that the electric and electrochemical properties of the carbon steel are determined by the processes in a thin n-type semiconductor layer and at its interface with the electrolyte.
    Original languageEnglish
    Pages (from-to)1146-1156
    Number of pages11
    JournalCorrosion Science
    Volume51
    Issue number5
    DOIs
    Publication statusPublished - 2009
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Heavy water reactors
    Oxides
    Carbon steel
    Corrosion
    Electrochemical properties
    Electrolytes
    Electric properties
    Gravimetric analysis
    Voltammetry
    Electrochemical impedance spectroscopy
    Kinetic parameters
    X ray diffraction analysis
    Electron microscopy
    Oxide films
    Semiconductor materials
    Water
    Hot Temperature

    Cite this

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    title = "Characterisation of the oxide layer on carbon steel during hot conditioning of primary heat transport systems in heavy-water reactors",
    abstract = "The corrosion layer formation on carbon steel during hot conditioning of primary heat transport systems of pressurised heavy-water reactors has been characterised using ex-situ methods (gravimetry, electron microscopy, X-ray diffractometry). In addition, the electric and electrochemical properties of the corrosion layers have been followed in-situ by voltammetry and electrochemical impedance spectroscopy during exposure to simulated hot conditioning water chemistry. The corrosion layer formed has been found to be a bilayer oxide of the inverse spinel type. The impedance data have been quantitatively interpreted using the Mixed-Conduction Model for oxide films allowing for the estimation of certain kinetic parameters at the compact layer/electrolyte interface. The obtained results point out to the fact that the electric and electrochemical properties of the carbon steel are determined by the processes in a thin n-type semiconductor layer and at its interface with the electrolyte.",
    author = "M. Bojinov and K. Gaonkar and S. Ghosh and V. Kain and K. Kumar and Timo Saario",
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    Characterisation of the oxide layer on carbon steel during hot conditioning of primary heat transport systems in heavy-water reactors. / Bojinov, M. (Corresponding Author); Gaonkar, K.; Ghosh, S.; Kain, V.; Kumar, K.; Saario, Timo.

    In: Corrosion Science, Vol. 51, No. 5, 2009, p. 1146-1156.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Characterisation of the oxide layer on carbon steel during hot conditioning of primary heat transport systems in heavy-water reactors

    AU - Bojinov, M.

    AU - Gaonkar, K.

    AU - Ghosh, S.

    AU - Kain, V.

    AU - Kumar, K.

    AU - Saario, Timo

    PY - 2009

    Y1 - 2009

    N2 - The corrosion layer formation on carbon steel during hot conditioning of primary heat transport systems of pressurised heavy-water reactors has been characterised using ex-situ methods (gravimetry, electron microscopy, X-ray diffractometry). In addition, the electric and electrochemical properties of the corrosion layers have been followed in-situ by voltammetry and electrochemical impedance spectroscopy during exposure to simulated hot conditioning water chemistry. The corrosion layer formed has been found to be a bilayer oxide of the inverse spinel type. The impedance data have been quantitatively interpreted using the Mixed-Conduction Model for oxide films allowing for the estimation of certain kinetic parameters at the compact layer/electrolyte interface. The obtained results point out to the fact that the electric and electrochemical properties of the carbon steel are determined by the processes in a thin n-type semiconductor layer and at its interface with the electrolyte.

    AB - The corrosion layer formation on carbon steel during hot conditioning of primary heat transport systems of pressurised heavy-water reactors has been characterised using ex-situ methods (gravimetry, electron microscopy, X-ray diffractometry). In addition, the electric and electrochemical properties of the corrosion layers have been followed in-situ by voltammetry and electrochemical impedance spectroscopy during exposure to simulated hot conditioning water chemistry. The corrosion layer formed has been found to be a bilayer oxide of the inverse spinel type. The impedance data have been quantitatively interpreted using the Mixed-Conduction Model for oxide films allowing for the estimation of certain kinetic parameters at the compact layer/electrolyte interface. The obtained results point out to the fact that the electric and electrochemical properties of the carbon steel are determined by the processes in a thin n-type semiconductor layer and at its interface with the electrolyte.

    U2 - 10.1016/j.corsci.2009.02.006

    DO - 10.1016/j.corsci.2009.02.006

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    EP - 1156

    JO - Corrosion Science

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